+static bool is_dev_loop(const char *blkname)
+{
+ char *buffer;
+ DIR *dir;
+ struct dirent *entry;
+ bool ret = false;
+
+ buffer = malloc(PATH_MAX);
+ if (!buffer) {
+ syslog(LOG_ERR, "Can't allocate memory!");
+ exit(1);
+ }
+
+ snprintf(buffer, PATH_MAX, "%s/loop", blkname);
+ if (!access(buffer, R_OK | X_OK)) {
+ ret = true;
+ goto free_buffer;
+ } else if (errno != ENOENT) {
+ syslog(LOG_ERR, "Can't access: %s; error:%d %s!",
+ buffer, errno, strerror(errno));
+ }
+
+ snprintf(buffer, PATH_MAX, "%s/slaves", blkname);
+ dir = opendir(buffer);
+ if (!dir) {
+ if (errno != ENOENT)
+ syslog(LOG_ERR, "Can't opendir: %s; error:%d %s!",
+ buffer, errno, strerror(errno));
+ goto free_buffer;
+ }
+
+ while ((entry = readdir(dir)) != NULL) {
+ if (strcmp(entry->d_name, ".") == 0 ||
+ strcmp(entry->d_name, "..") == 0)
+ continue;
+
+ snprintf(buffer, PATH_MAX, "%s/slaves/%s", blkname,
+ entry->d_name);
+ if (is_dev_loop(buffer)) {
+ ret = true;
+ break;
+ }
+ }
+ closedir(dir);
+free_buffer:
+ free(buffer);
+ return ret;
+}
+